40 results about "Space group" patented technology

This invention relates to the field of chemical pharmaceuticals, and more particularly to a mebendazole crystal form and its preparation method. The mebendazole crystal form has a single-crystal structure belonging to the triclinic crystal system; space group Triclinic P; cell parameters a = 6.10 Å, b = 15.69 Å, c = 20.35 Å; α = 94.14°; β = 97.22°, γ = 90.70°, V = 1926 Å. 3 The optimization and development of the crystalline form of p-toluimidazole provided by this invention is of great value.

This invention discloses a samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material, its preparation method, and its applications. The samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material belongs to the monoclinic crystal system, has a space group of Cm, and a chemical formula of Sm. 0.3 La 0.1 :Y 0.6 Ca4O(BO3)3 has a second harmonic response intensity of 0.89 × KDP, and exhibits transmittance exceeding 80% in the 500–1000 nm and 1600–2400 nm wavelength ranges. It also has a strong absorption peak in the 1000–1600 nm wavelength range. Therefore, the samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal can be considered as a nonlinear optical crystal material with broad application prospects in the field of optics.

The application discloses a three-dimensional ferroelectric material based on two-dimensional ice stacking and preparation and application thereof, and belongs to the technical field of ferroelectric materials and multifunctional devices. The material is a three-dimensional periodic crystal structure of monoclinic P21 space group, water molecules in the material form a completely saturated network through hydrogen bonds, and there is no suspended hydrogen; interlayers are coupled through van der Waals force to form a multi-level cooperative ferroelectric sequence of "in-plane hydrogen bond ferroelectric + interlayer van der Waals ferroelectric". The material has the characteristics of a wide-bandgap semiconductor (band gap 5-6 eV), extreme anisotropic mechanical properties (Z-axis Young's modulus 48.6 GPa, Eyx=0.973), moderate bulk modulus (12.23 GPa), good acoustic performance (sound velocity 2638 m / s) and extremely high pressure stability (0-3000 GPa structure is complete, 1190 GPa metalization transition). The material can be widely applied in the fields of X-ray optical devices, ferroelectric memories, deep ultraviolet photoelectric detectors, extreme high-pressure sensors, directional stress sensors, mechanical logic devices, surface acoustic wave filters, multifunctional integrated microsystems and multi-parameter composite sensing networks, and opens up a new direction for pure water-based functional materials.

The application belongs to the technical field of functional crystal materials, and more particularly relates to a high-stability two-dimensional Dion-Jacobson type non-lead polar hybrid perovskite crystal and a preparation method and application thereof. The high-stability two-dimensional Dion-Jacobson type non-lead polar hybrid perovskite crystal has a chemical formula of (4AMPY)2AgBiBr8, belongs to a monoclinic system, and has a space group of P21. The crystal is prepared into an X-ray detector, which can realize efficient and stable X-ray detection under zero bias voltage and high bias voltage. The single crystal is irradiated by different X-ray irradiation doses, and the X-ray response performance thereof is tested. When the crystal is irradiated by different X-ray irradiation doses, the crystal exhibits obvious light response, and the result shows that the material has potential application value as an X-ray detection material.

A sulfide solid electrolyte is provided, characterized in that it has an LGPS-type crystal structure belonging to space group P42 / nmc, and in X-ray diffraction measurements using CuKα rays, the half-width of the peak at 2θ = 29.58° ± 1.0° is less than 0.1.

The application provides a fluorinated guanidinium borate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is [C(NH2)3]B6O9F, the molecular weight is 287.95, the crystal belongs to an orthorhombic system, the space group is Pnma, Pna 21, the cell parameter is a=7.8420(11) Å, b=15.1862(19) Å, c=8.5762(9) Å, α =90°, β =90°, γ =90°, the unit cell volume is 1021.3(2) ų, the crystal is grown by a high-temperature solution method or a flux method, the frequency doubling effect of the crystal is 0.4 times of that of KH2PO4 (KDP), the ultraviolet cutoff edge is 190 nm, the birefringence is large, the birefringence is 0.133 @ 1064 nm, and the deep ultraviolet phase matching capability is deep, the shortest matching wavelength is 196 nm, and the crystal can be applied to deep ultraviolet nonlinear optical crystals in a full solid-state laser.

This invention relates to a nonlinear optical crystal of potassium triacetate dihydrate, its preparation method, and its uses. The molecular formula of the crystal is K3C6O8H. 10 It has a molecular weight of 331.62, belongs to the orthorhombic crystal system, and has a space group of [missing information]. P 212121, cell parameters are a =8.7596(5)Å, b =10.0487(6)Å, c =13.9979(6)Å, α =90.00° β =90.00° gamma =90.00° Z =4, V =1232.13(11)Å 3 Centimeter-sized crystals were grown using an evaporation method and an aqueous solution cooling method. Under 1064nm laser irradiation, the powder frequency doubling effect of this crystal was equivalent to that of KH₂PO₄. 4 (KDP). This crystal has an ultraviolet absorption edge shorter than 200 nm and an experimental birefringence of approximately 0.06 at 546 nm. It is simple to prepare, low in cost, exhibits significant nonlinear optical effects, a large birefringence, a wide transmission range, and is easy to grow and process. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.

This invention relates to a series of alkali metal rare earth chalcogenides and a series of alkali metal rare earth chalcogenide nonlinear optical crystals, their preparation methods, and their applications. The general chemical formula for both the series of halides and the nonlinear optical crystals is A3Ln. 11 Ga 19 Q 45 X3, where A = K, Rb, Cs; Ln = La, Pr, Nd; Q = S, Se; X = Cl, Br, I, all belong to the hexagonal crystal system with space group and cell parameter Z = 1. This series of halides is synthesized using a high-temperature solid-state method, while this series of nonlinear optical crystals is grown using a high-temperature solution method or the Bridgman process. This material can be used to manufacture second harmonic generators, up- and down-frequency converters, optical parametric oscillators, etc.

This invention discloses a method for growing superconducting RCoC2 single crystals. The method includes: S1, preparing materials according to the stoichiometric ratio of R, Co, and C elements, with the total carbon input compensating for 3%-5% relative to the stoichiometric ratio of RCoC2. The carbon source consists of C blocks and C powder, with the C powder accounting for 7%-15% of the total carbon source and having a particle size of 53-150 μm; S2, placing the raw materials in an arc melting furnace in the order of Co, C, and R, and adding an oxygen absorber; S3, evacuating and then filling with a protective atmosphere; S4, melting the raw materials under the protective atmosphere, flipping them over, and repeating the melting process; S5, cooling to obtain superconducting RCoC2 single crystals. This method can stably obtain millimeter-scale, non-centrosymmetric superconducting RCoC2 single crystals with an Amm² space group. When R is Y, the YCoC2 single crystal exhibits a superconducting transition at low temperatures, with a maximum superconducting transition temperature of 3.7 K. This single crystal can be used to prepare superconducting materials, samples for low-temperature transport research, or samples for topological superconductivity research.

The application relates to the field of crystal structure symmetry classification and retrieval, and specifically discloses a crystal structure symmetry determination and retrieval method using electron diffraction, which comprises the following steps: a multi-view selected area electron diffraction data input module is used to acquire a two-zone axial diffraction spectrum and perform pretreatment; a symmetry feature coding module is used to extract a single-view descriptor through a double-branch convolutional neural network, to obtain a material descriptor through view pooling fusion; a hierarchical symmetry classification module is used to realize hierarchical classification of crystal systems and space groups, and to guarantee the logic of the results through consistency constraints; a high-dimensional feature embedding and database construction module is used to standardize crystal structure files, to generate descriptors, and to construct a vector database; and a constrained structure retrieval module is used to combine the classification results and user constraints to filter candidate structures, and to complete retrieval through cosine similarity. The application solves the problems of poor generalization, insufficient multi-view feature fusion and inability to associate a crystal library in the prior art, and realizes full-process automation of crystal structure symmetry classification and retrieval.

The application relates to a compound arsenic-silicon-gallium-strontium and an infrared nonlinear optical crystal of arsenic-silicon-gallium-strontium, a preparation method and application, the compound has a molecular formula of SrGa3Si4As 11 , a molecular weight of 1233.26 g / mol, an asymmetric center, and is crystallized in a hexagonal crystal system P , a 63 space group, a cell parameter of a=b=9.2604(3) A, c=11.6484(5) A, Z=2, and V=865.08(7) A 3 , and is prepared into a crystal by using a high-temperature melt method, a chemical vapor phase transmission method or a flux method. The crystal has strong laser damage resistance, large nonlinear optical effect, wide infrared transmission range, and simultaneously has the advantages of large hardness, good mechanical property, not easy to break and deliquesce, easy to process and store and the like, and can be used for manufacturing infrared nonlinear optical devices.

This invention provides a three-dimensional covalent organic framework material, its preparation method, and its applications. The material is constructed by the condensation of biphenyl-3,3',5,5'-tetraaldehyde and p-phenylenediamine via imine bonds; it possesses a hexagonal crystal system, P6 space group, and a qtz topology with triple interpenetrating atom (AA) packing, and a BET specific surface area of ​​1408 m². 2 The material exhibits a high adsorption capacity ( / g), thermal stability up to 410℃; and at 298 K and 1.0 bar, it achieves an adsorption capacity of 18.8 mmol / g for pure NO2, 7.41 mmol / g for pure SO2, and 5.52 mmol / g for pure NH3. It can deeply purify 2500 ppm NO2 / SO2 to <0.1 ppm, with an NO2 / SO2 selectivity >5000. Under humid conditions, its NO2 capture efficiency not only does not significantly decrease but also shows a certain degree of improvement. Cyclic tests of the material's NO2 enrichment and conversion show excellent capture and conversion effects over three cycles, effectively converting captured NO2 into nitric acid. With its extremely high NO2 / SO2 / NH3 adsorption capacity, selectivity, and stability, it is suitable for the efficient capture and deep purification of toxic gases in the atmosphere.

The application discloses application of In2Te5 crystal in preparation of a nonlinear optical device in an infrared wave band. The In2Te5 crystal belongs to a monoclinic system, a Cc space group, has a cell parameter of alpha = gamma = 90 DEG, beta = 91.65 DEG, z = 4, and a unit cell volume of 0.56. The In2Te5 crystal can be used as a nonlinear optical material in preparation of a nonlinear optical device, and its frequency doubling coefficient is about 2-3 times of that of a ZnGeP2 crystal and 15 times of that of an AgGaS2 crystal. The infrared transmission range of the In2Te5 crystal can reach 30 microns. The optical birefringence of the In2Te5 crystal can reach 0.56, so the In2Te5 crystal can be used as a good mid-infrared nonlinear optical material, a mid-infrared photoconductive material and a mid-infrared birefringent material, and can be widely applied in various nonlinear optical fields, especially in the nonlinear optical application in the mid-infrared wave band.

This invention relates to a scandium-terbium-gallium garnet magneto-optical crystal without radial stripes and its preparation method. The Tb3Sc crystal was grown using the Czochralski method. x Ga 5‑x O 12 The magneto-optical crystal (where x = 0.05–0.3) belongs to the cubic crystal system and has the space group Ia–3d. This method utilizes a small amount of Sc... 3+ Partial Ga doping 3+ This helps suppress the formation of spiral dislocation-related defects, enabling the growth of high-quality terbium gallium garnet magneto-optical crystals without radial stripes. Low-concentration Sc 3+ The doping strategy has shown excellent results in addressing the radial stripe defect in TGG crystals and improving their key performance characteristics, providing a practical new approach for the fabrication of core materials for magneto-optical devices. This crystal material is expected to find practical applications in magneto-optical devices such as magneto-optical isolators, magneto-optical circulators, and magneto-optical modulators.

This application discloses a fluorinated zirconium phosphate compound, its nonlinear optical crystal, its preparation method, and its applications. The chemical formula of the fluorinated zirconium phosphate compound is Zr(H2PO4)(HPO4)F·nH2O, where 0≤n≤3, and n is an integer. Its nonlinear optical crystal consists of a two-dimensional infinite layered structure formed by [ZrO5F] coordination polyhedra and [HPO4] and [H2PO4] tetrahedra connected by shared oxygen atoms, with interlayer crystal water molecules forming a hydrogen bond network. The nonlinear optical crystal is a non-centrosymmetric crystal; it belongs to the monoclinic crystal system; and its space group is [missing information - likely a specific space group or group]. I 2; The unit cell parameters of a nonlinear optical crystal are a =10.1200(5)Å, b =6.5653(3)Å, c =15.6899(8), β =92.340(5), unit cell volume V =1041.58(9)Å 3 This nonlinear optical crystal possesses deep ultraviolet transparency, a considerable frequency doubling response, and high birefringence, thus meeting the application requirements of nonlinear optical devices. Furthermore, the preparation method has the advantages of simple operation, low cost, low pollution, and low toxicity of the raw materials used.

The application discloses a 5-ALA phosphate monocrystal and a preparation method thereof, and relates to the technical field of monocrystals. The 5-ALA phosphate monocrystal has a crystal structure belonging to a monoclinic system, a space group P121 / c1, and cell parameters including a length a=11.0810 angstrom, b=9.2681 angstrom, c=9.3131 angstrom, an angle alpha=90.00 degree, beta=92.793 degree, and gamma=90.00 degree. Compared with the amorphous / polycrystalline 5-ALA phosphate in the prior art, the crystal form of which is unknown, the monocrystal of the application belongs to the monoclinic system (space group P121 / c1), the cell parameters are clear, the R factor is less than or equal to 0.0384 as determined by single crystal X-ray diffraction, the purity is greater than or equal to 99.5%, and there is no solvent co-crystallization impurity, so that the problem of large performance difference between product batches is solved.

This invention discloses a method and apparatus for determining the structure of covalent organic frameworks (COFs) by combining XRD data and artificial intelligence. The method collects information on COF precursors and inputs it into an AI model. A particle swarm optimization heuristic algorithm is used to construct and screen effective COF candidate structures in a global search space. Using crystallographic calculation tools, bond lengths and bond angles are calculated and theoretical XRD patterns are simulated by combining the atomic coordinates, unit cell parameters, and space group information of the effective COF candidate structures. Combining experimental real XRD patterns and the average bond lengths and bond angles from the COF database, a fitness function is defined and calculated to quantify structural differences. Based on the fitness function value, the algorithm iteratively adjusts the structural parameters to generate new structures. This process is repeated until the function value converges or the maximum number of iterations is reached. The structure that meets the conditions is output as the final crystal structure of the target COF. This invention solves the problems of low efficiency, high cost, and low success rate in resolving complex systems in existing technologies.

The application belongs to the field of covalent organic framework materials, and particularly relates to synthesis of a compound, a covalent organic framework material containing bimetal units, a preparation method and use thereof. The structural unit belongs to a hexagonal crystal system P3 space group, and cell parameters are alpha=90°, beta=90°, gamma=120°. Due to the uniqueness of the material structure, the material can be used as a photocatalyst, and can directly perform a gas-liquid catalytic reaction under visible light driving to reduce carbon dioxide into carbon monoxide, with a yield of 320 micromoles per gram ‑1 , and an average of 64 micromoles per gram ‑1 h ‑1 per hour.

This invention relates to a series of malonate borate nonlinear optical crystals, their preparation methods, and applications. The general molecular formula of this series of compounds is AM[C3H2O4]B(OH)3(H2O). x Where A = K, Rb, Cs; M = K, Rb, Cs, x = 0, 1, molecular weight is 242.08–436.72, prepared by room temperature solution method, orthorhombic crystal system, space group P 212121 (No. 19), with cell parameters a = 6.6168(11) - 7.256(3) Å, b = 9.574(5) - 10.271(3) Å, c = 13.0172(12) - 13.984(5) Å. α =90, β =90, gamma =90, Z =4, V=851.3(4)-1042.2(7)Å 3 The series of malonate borate nonlinear optical crystals obtained by this method have advantages such as a wide transmission band, stable physicochemical properties, moderate mechanical hardness, resistance to breakage, and ease of cutting, polishing, and storage. They can withstand 1064nm infrared light incident on AM[C3H2O4]B(OH)3(H2O). x The crystal can produce green frequency-doubled light with a wavelength of 532nm, and the output intensity is about 0.5-1.2 times that of KDP under the same conditions.

This invention relates to a nonlinear optical crystal of guanidinoacetic acid chloride, its preparation method, and its uses. The crystal has the molecular formula C3N3O2H8Cl, a molecular weight of 153.57, belongs to the tetragonal crystal system, and has a space group of [missing information]. I 2 d The unit cell parameters are a =15.7150(13)Å, b =15.7150(13)Å, c =11.0742(15)Å, α =90.00° β =90.00° gamma =90.00° Z =16, V =2734.9(6)Å 3 Centimeter-sized crystals were grown using evaporation, aqueous solution cooling, or hydrothermal methods. Under 1064 nm laser irradiation, the crystal exhibited a frequency doubling response similar to that of potassium dihydrogen phosphate. The ultraviolet absorption edge of the crystal was approximately 250 nm, and the experimental birefringence was approximately 0.08 at 546 nm. This crystal preparation method is simple and low-cost, possesses significant nonlinear optical effects, a large birefringence, a wide transmission range, and is easy to grow and process. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.

This invention relates to a cesium hydroxyfluoroborate nonlinear optical crystal, its preparation method, and its uses. The crystal has the molecular formula CsB3O3F2(OH)2, belongs to the orthorhombic crystal system, and has the space group [missing information]. PCA 21, molecular weight 285.4, unit cell parameters are a =15.333(3)Å, b =6.176(4) Å, c =14.373(3)Å, α =90.00° β =90.00° c =90.00° Z =8, V =1361.1Å 3 The crystals are grown using room-temperature solvent evaporation or hydrothermal methods. This series of crystals has an ultraviolet transmission cutoff edge below 190 nm and an experimental birefringence of approximately 0.08 at 546 nm. The crystal preparation method is simple and low-cost, exhibiting significant nonlinear optical effects, a large birefringence, a wide transmission range, and ease of growth and processing. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.

This invention relates to imidazole trifluoroacetamidine nonlinear optical crystals, their preparation methods, and applications. The crystal has the molecular formula C(NH₂)₂CF₃(C₃N₂H₃), a molecular weight of 180.15, belongs to the orthorhombic crystal system, and has a space group of [missing information]. I 212121, cell parameters are a =8.781(1)Å, b =9.0684(9)Å, c =9.1540(8)Å, α =90.00° β =90.00° gamma =90.00° Z =4, V =728.93(13)Å 3 A millimeter-sized crystal was grown using an evaporation method and an aqueous solution cooling method. The crystal's ultraviolet absorption edge is shorter than 210 nm, and its experimental birefringence is approximately 0.12 at 546 nm. The preparation method is simple and low-cost, exhibiting significant nonlinear optical effects, a large birefringence, a wide transmission range, and ease of growth and processing. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.

The application discloses a fluorine-containing zirconium phosphate compound, a nonlinear optical crystal thereof and a preparation method and application thereof, and belongs to the technical field of inorganic functional crystal materials. The chemical formula of the fluorine-containing zirconium phosphate compound is ZrPO4F. The nonlinear optical crystal is composed of a [PO4] tetrahedron and a fluorine-containing zirconium coordination polyhedron to form a three-dimensional skeleton structure, zirconium is six-coordinated and forms a zirconium oxygen coordination polyhedron containing F; the nonlinear optical crystal is a non-centrosymmetric crystal; the nonlinear optical crystal is of an orthorhombic system; the space group of the nonlinear optical crystal is Pna 21; the cell parameters of the nonlinear optical crystal are a = 11.6094 (5) Å, b = 6.9038 (3) Å, c = 5.4921 (2) Å, α = β = γ = 90°, Z = 4, and the unit cell volume is V = 440.19 (3) Å 3 . The nonlinear optical crystal has a nonlinear optical effect, a large band gap (deep ultraviolet transparency), a wide transmission range and easy preservation, and is a nonlinear optical crystal material with great potential application value.

This invention provides a two-dimensional triangular lattice rare-earth-based titanate polycrystalline material, its preparation method, and its applications. The chemical formula of the rare-earth-based titanate polycrystalline material is Ba6M2Ti4O. 17 The space group is P63 / mmc, where M is one or more of Nd, Gd, and Yb. The novel two-dimensional triangular lattice rare-earth-based titanate polycrystalline material provided by this invention has a compact structure, a simple preparation process, and its frustrated structure of localized electron spins significantly reduces the minimum cooling temperature to the tens of millikons. Furthermore, it exhibits high magnetic ion density and large cooling capacity, making it an excellent magnetic refrigerant.

The application relates to a novel infrared nonlinear optical crystal Ag4Ge3S7 and a preparation method thereof, and belongs to the field of inorganic materials. The Ag4Ge3S7 crystal has a non-centrosymmetric structure, belongs to a monoclinic system, a space group is Cc, a cell parameter is a=11.3613(3) angstrom, b=6.8380(2) angstrom, c=15.7941(4) angstrom, alpha=gamma=90 DEG, beta=93.032(2) DEG, a cell volume V=1225.30(6) angstrom 3 , and Z=4. The Ag4Ge3S7 crystal and a pure phase are prepared by a high-temperature solid-phase reaction method. Infrared nonlinear powder frequency doubling tests show that, under the irradiation of 2100nm laser as base frequency light, the Ag4Ge3S7 has strong nonlinear optical effect, and the signal strength is 1.15 times that of a classical infrared material AgGaS2; meanwhile, the Ag4Ge3S7 has a type of phase matching characteristics. The obtained infrared nonlinear optical crystal material Ag4Ge3S7 has potential application value in the field of infrared laser frequency conversion.

This application discloses a fluorinated zirconium phosphate compound, its nonlinear optical crystal, its preparation method, and its applications. The chemical formula of the fluorinated zirconium phosphate compound is Rb. x (NH4) y Zr4(H2PO4)F 21 Where 0≤x≤6, 0≤y≤6, and x+y=6. The nonlinear optical crystal is a one-dimensional chain structure formed by connecting [H2PO4] tetrahedra with [ZrF7] / [ZrOF7] fluorine-containing zirconium coordination polyhedra; the nonlinear optical crystal is a non-centrosymmetric crystal; the nonlinear optical crystal is an orthorhombic crystal system; the space group of the nonlinear optical crystal is... Pna 21; The unit cell parameters of a nonlinear optical crystal are a =13.6933(3)Å, b =15.2014(4)Å, c =11.4304(2)Å, α = β = γ =90°, unit cell volume V =2379.32(9)Å 3 This nonlinear optical crystal possesses both deep ultraviolet transparency and a strong second harmonic response. The fabrication method utilizes a hydrothermal reaction, which is simple and operates under mild conditions. The resulting nonlinear optical crystal can be used to construct nonlinear optical devices such as frequency multipliers, sum / difference frequency converters, and optical parametric oscillators.

The present invention provides a β-cesium cadmium silicon sulfide compound, a β-Cs2CdSi4S10 infrared nonlinear optical crystal, as well as their preparation methods and applications. The β-cesium cadmium silicon sulfide compound has a chemical formula β-Cs2CdSi4S10 and a molecular weight of 755.04. The β-Cs2CdSi4S10 infrared nonlinear optical crystal belongs to the tetragonal crystal system, its space group is I-4, and its unit cell parameters are: a=8.4233(7) Å, c=14.6136(12) Å, and the unit cell volume is 1036.86(19) Å3. The present invention adopts a vacuum packaging method to prepare a β-Cs2CdSi4S10 infrared nonlinear optical crystal. By using the kurtz-berry method, it was found that the frequency doubling effect of β-Cs2CdSi4S10 crystal is approximately 1.1-1.2 times that of AgGaS2(AGS). By using the UV-visible diffuse reflection, it was found that the β-Cs2CdSi4S10 crystal has the crystal bandgap of 4.21 eV, the UV cutoff edge of 254 nm, and the infrared transparency range greater than 13 μm. The preparation method of the β-Cs2CdSi4S10 infrared nonlinear optical crystal of the present invention is simple, with a short growth period, and avoids the leakage and contamination of raw materials. The β-Cs2CdSi4S10 infrared nonlinear optical crystal of the present invention can be used to fabricate conversion devices for high-power laser output applications and has important applications in atmospheric remote sensing and communication fields.

The application discloses a coenzyme I crystal form and application thereof, relates to the technical field of nicotinamide adenine dinucleotide preparation, and belongs to the technical field of nicotinamide adenine dinucleotide preparation. The coenzyme I crystal form is a triclinic crystal system and has a Pl or Pl space group. The crystal lattice constant is a = 8.5894 Å, b = 8.8623 Å, c = 11.2009 Å, alpha = 109.803 DEG, beta = 90.697 DEG and gamma = 103.709 DEG. The coenzyme I crystal form provided by the application is a hydrate crystal form with high crystallinity, has good solid-state properties, the content of an effective component is obviously higher than that of a freeze-dried raw material sample, the content of maximum single substance and total impurities is obviously lower than that of the freeze-dried raw material sample, and with the prolongation of storage time, the content of maximum single substance and total impurities does not obviously increase after storage for 12 months.